https://tede.unioeste.br/handle/tede/507 2026-08-14T14:28:21Z 2026-08-14T14:28:21Z Batista, Edivaldo Ramos https://tede.unioeste.br/handle/tede/8608 2026-08-12T19:32:31Z 2026-05-18T00:00:00Z

Title: Uma abordagem teórico-didática dos números irracionais na Educação Básica Autor: Batista, Edivaldo Ramos Primeiro orientador: Guzzo, Sandro Marcos Abstract: In this work, we investigate irrational numbers from a mathematical and pedago gical perspective, with emphasis on the constants π and e and on irrational values associated with trigonometric functions of angles measured in rational degrees. We present theoretical results and elementary demonstrations concerning the irrationa lity of these numbers, as well as classical methods of numerical approximation. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Dissertação

2026-05-18T00:00:00Z Santos, Raynne Raphaela Rodrigues https://tede.unioeste.br/handle/tede/8571 2026-07-30T14:04:27Z 2026-02-23T00:00:00Z

Title: Sustem Hidropônico em Desenvolvimento de Alface com Suplementação de LED Vermelho e Azul. Autor: Santos, Raynne Raphaela Rodrigues Primeiro orientador: Siqueira, Jair Antonio Cruz Abstract: The objective of the study was to analyze the growth of lettuce in a hydroponic system, supplemented with red and blue LEDs, under partially controlled climatic conditions. The goal is to obtain results indicating that the use of red and blue light leads to greater efficiency in production, surpassing the growth of lettuce without supplemental lighting. Seedlings were first grown in a nursery for a few days and then transferred to an NFT (Nutrient Film Technique) hydroponic system. The plnts were exposed to natural light, with and without supplemental LED Grow lighting, for 32 days. At the end of this period, several parameters were evaluated: number of leaves (NF), root length (CR), STEM LENGTH (CC), stem diameter (DCA), fresh root mass (MVP), fresh root mass (MVR), fresh stem mass (MVC), dry shoot mass (MSP), dry root mass (MSR), and dry stem mass (MSC). The experiment considered climatic variations into account. Smooth-lettuce stood out for having a higher number of leaves and fresh mass, regardless of the lighting source. Curly lettuce showed better root development under natural light. It is concluded that artificial light is a viable alternative; however, natural light may be more efficient for sensitive cultivars. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Dissertação

2026-02-23T00:00:00Z Rotta, Marcelo Paiva https://tede.unioeste.br/handle/tede/8568 2026-07-30T12:57:02Z 2026-03-02T00:00:00Z

Title: Desenvolvimento, avaliação técnica e econômica de uma roda d’água flutuante para bombeamento de água. Autor: Rotta, Marcelo Paiva Primeiro orientador: Nogueira, Carlos Eduardo Camargo Abstract: Access to water for irrigation and agricultural activities in remote rural areas often depends on alternative energy solutions, especially in locations without connection to the electric power grid. This study presents the development and experimental investigation of a water pumping system driven by a floating water wheel, designed to operate exclusively through the hydrokinetic energy of a natural watercourse. The system was constructed, installed, and tested along a stretch of the Tormenta River, in the municipality of Catanduvas, in the state of Paraná, Brazil, where measurements of pumped flow rate, manometric head, torque, rotational speed, and current velocity were performed. Based on the experimental data, hydraulic power, mechanical power, and pumping power were determined, as well as the hydraulic, mechanical, and overall efficiencies of the system. The prototype operated continuously, despite the intermittent behavior characteristic of the Wirtz pump, and achieved a maximum hydraulic efficiency of 72%. The maximum mechanical and overall efficiencies were 7.94% and 5.71%, respectively. The pumped flow rates proved to be compatible with the water demands of small family farms. The economic analysis indicated the system’s feasibility, with an implementation cost of R$ 2,500.00. Compared with the avoided cost of conventional water supply, the system presented a discounted payback period shorter than the estimated service life of the equipment and a levelized energy cost of R$ 1.00 per m³ of pumped water. The results demonstrate that floating water wheels constitute a sustainable, low-cost, and technically feasible solution for isolated rural communities. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Dissertação

2026-03-02T00:00:00Z Fornazari, Maevi https://tede.unioeste.br/handle/tede/8567 2026-07-30T12:37:25Z 2026-03-10T00:00:00Z

Title: Aproveitamento de Resíduos de Poda Urbana para produção de Biocombustível Sólido integrando Biomassa Sustentável. Autor: Fornazari, Maevi Primeiro orientador: Bariccatti, Reinaldo Aparecido Abstract: The energy crisis is a reality, and the problems arising from it are intensifying every day due to uncontrolled population growth and degrading anthropogenic actions. Therefore, it is essential to search for alternative energy sources to meet global energy needs without compromising future generations. Microalgae are photosynthetic organisms, and their biomass is attractive for energy generation because it is composed of macromolecules with a binding effect. The microalgae species Chlorella vulgaris Benj. can be cultivated in aquaculture wastewater, as it develops by absorbing nutrients from the effluent. The improper disposal of urban pruning waste (RPU), organic material that takes a long time to degrade, is also an environmental challenge that requires attention, with the use of this waste for energy being a sustainable alternative. In floodplain areas, it is possible to observe the massive growth of the aquatic macrophyte Typha domingensis (cattail), a plant that can become invasive and harm the development of other living beings, reducing the biodiversity of the environment. Cattail has an interesting chemical composition and can be used to generate energy in the form of briquettes. In this context, this study sought to produce briquettes from the integration of Chlorella vulgaris, Typha domingensis, and Urban Pruning Waste (UPW) biomass, with subsequent evaluation of the energy and binding potential of each biomass. The experiments were conducted under laboratory conditions. The microalgae were cultivated in aquaculture wastewater and the briquettes were made in a handmade press, without the application of heat. The results obtained were satisfactory, especially with briquettes produced from the integration of biomass (80% RPU + 10% C. vulgaris + Typha domingensis), which presented maximum breaking force (139,80 N), mechanical resistance (1.14 MPa), and higher calorific value (17.179 MJ/kg). The data therefore suggest that the inclusion of organic and natural biomass, especially in an integrated form, is extremely viable in the production of briquettes, resulting in competitive products that represent a sustainable alternative to conventional products of food or chemical origin. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Dissertação

2026-03-10T00:00:00Z